PMID- 21989871
OWN - NLM
STAT- MEDLINE
DCOM- 20120222
LR  - 20161125
IS  - 1525-8955 (Electronic)
IS  - 0885-3010 (Linking)
VI  - 58
IP  - 10
DP  - 2011 Oct
TI  - Image reconstruction in intravascular photoacoustic imaging.
PG  - 2067-77
LID - 10.1109/TUFFC.2011.2057 [doi]
AB  - Intravascular photoacoustic (IVPA) imaging is a technique for visualizing 
      atherosclerotic plaques with differential composition. Unlike conventional 
      photoacoustic tomography scanning, where the scanning device rotates around the 
      subject, the scanning aperture in IVPA imaging is enclosed within the imaged 
      object. The display of the intravascular structure is typically obtained by 
      converting detected photoacoustic waves into Cartesian coordinates, which can 
      produce images with severe artifacts. Because the acquired data are highly 
      limited, there does not exist a stable reconstruction algorithm for such imaging 
      geometry. The purpose of this work was to apply image reconstruction concepts to 
      explore the feasibility and efficacy of image reconstruction algorithms in IVPA 
      imaging using traditional analytical formulas, such as a filtered back-projection 
      (FBP) and the lambda-tomography method. Although the closed-form formulas are not 
      exact for the IVPA system, a general picture of and interface information about 
      objects are provided. To improve the quality of the reconstructed image, the 
      iterative expectation maximization and penalized least-squares methods were 
      adopted to minimize the difference between the measured signals and those 
      generated by a reconstructed image. In this work, we considered both the ideal 
      point detector and the acoustic transducers with finite- size aperture. The 
      transducer effects including the spatial response of aperture and 
      acoustoelectrical impulse responses were incorporated in the system matrix to 
      reduce the aroused distortion in the IVPA reconstruction. Computer simulations 
      and experiments were carried out to validate the methods. The applicability and 
      the limitation of the reconstruction method were also discussed.
FAU - Sheu, Yae-lin
AU  - Sheu YL
AD  - Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan.
FAU - Chou, Cheng-Ying
AU  - Chou CY
FAU - Hsieh, Bao-Yu
AU  - Hsieh BY
FAU - Li, Pai-Chi
AU  - Li PC
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - IEEE Trans Ultrason Ferroelectr Freq Control
JT  - IEEE transactions on ultrasonics, ferroelectrics, and frequency control
JID - 9882735
SB  - IM
MH  - Algorithms
MH  - Artifacts
MH  - Computer Simulation
MH  - Hair/chemistry/diagnostic imaging
MH  - Humans
MH  - Image Processing, Computer-Assisted/*methods
MH  - Least-Squares Analysis
MH  - Models, Biological
MH  - Phantoms, Imaging
MH  - Photoacoustic Techniques/instrumentation/*methods
MH  - Reproducibility of Results
MH  - Signal Processing, Computer-Assisted
MH  - Transducers
MH  - Ultrasonography, Interventional/*instrumentation
EDAT- 2011/10/13 06:00
MHDA- 2012/02/23 06:00
CRDT- 2011/10/13 06:00
PHST- 2011/10/13 06:00 [entrez]
PHST- 2011/10/13 06:00 [pubmed]
PHST- 2012/02/23 06:00 [medline]
AID - 10.1109/TUFFC.2011.2057 [doi]
PST - ppublish
SO  - IEEE Trans Ultrason Ferroelectr Freq Control. 2011 Oct;58(10):2067-77. doi: 
      10.1109/TUFFC.2011.2057.